Body help from girls please?

I'm flat chested but have a broad back, so I feel so unfeminine and have to stuff and be carefully with clothing. I can't wear dresses because straps look silly on my shoulders. I want to learn to love my body and I feel uncomfortable because I feel guys won't like me. lol can I say I have great legs and a$$ however can't appreciate it because my top half looks manly. it's upsetting because my 5 best friends are beautifull with great personalities too. I feel really sad, so please help? what clothes minimise a broad back but also make my boobs look better?